1#ifndef _PPC64_PTRACE_H 2#define _PPC64_PTRACE_H 3 4/* 5 * Copyright (C) 2001 PPC64 Team, IBM Corp 6 * 7 * This struct defines the way the registers are stored on the 8 * kernel stack during a system call or other kernel entry. 9 * 10 * this should only contain volatile regs 11 * since we can keep non-volatile in the thread_struct 12 * should set this up when only volatiles are saved 13 * by intr code. 14 * 15 * Since this is going on the stack, *CARE MUST BE TAKEN* to insure 16 * that the overall structure is a multiple of 16 bytes in length. 17 * 18 * Note that the offsets of the fields in this struct correspond with 19 * the PT_* values below. This simplifies arch/ppc64/kernel/ptrace.c. 20 * 21 * This program is free software; you can redistribute it and/or 22 * modify it under the terms of the GNU General Public License 23 * as published by the Free Software Foundation; either version 24 * 2 of the License, or (at your option) any later version. 25 */ 26 27#define INIT_TASK_SIZE 4*PAGE_SIZE 28 29#ifndef __ASSEMBLY__ 30#define PPC_REG unsigned long 31struct pt_regs { 32 PPC_REG gpr[32]; 33 PPC_REG nip; 34 PPC_REG msr; 35 PPC_REG orig_gpr3; /* Used for restarting system calls */ 36 PPC_REG ctr; 37 PPC_REG link; 38 PPC_REG xer; 39 PPC_REG ccr; 40 PPC_REG softe; /* Soft enabled/disabled */ 41 PPC_REG trap; /* Reason for being here */ 42 PPC_REG dar; /* Fault registers */ 43 PPC_REG dsisr; 44 PPC_REG result; /* Result of a system call */ 45}; 46 47#define PPC_REG_32 unsigned int 48struct pt_regs32 { 49 PPC_REG_32 gpr[32]; 50 PPC_REG_32 nip; 51 PPC_REG_32 msr; 52 PPC_REG_32 orig_gpr3; /* Used for restarting system calls */ 53 PPC_REG_32 ctr; 54 PPC_REG_32 link; 55 PPC_REG_32 xer; 56 PPC_REG_32 ccr; 57 PPC_REG_32 mq; /* 601 only (not used at present) */ 58 /* Used on APUS to hold IPL value. */ 59 PPC_REG_32 trap; /* Reason for being here */ 60 PPC_REG_32 dar; /* Fault registers */ 61 PPC_REG_32 dsisr; 62 PPC_REG_32 result; /* Result of a system call */ 63}; 64 65#endif 66 67#define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */ 68 69/* 70 * Size of dummy stack frame allocated when calling signal handler. 71 * These *MUST* be multiples of 16 since the ABI requires stack frames 72 * be quadword aligned. 73 */ 74#define __SIGNAL_FRAMESIZE 128 75#define __SIGNAL_FRAMESIZE32 64 76 77#define instruction_pointer(regs) ((regs)->nip) 78#define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1) 79 80/* 81 * Offsets used by 'ptrace' system call interface. 82 */ 83#define PT_R0 0 84#define PT_R1 1 85#define PT_R2 2 86#define PT_R3 3 87#define PT_R4 4 88#define PT_R5 5 89#define PT_R6 6 90#define PT_R7 7 91#define PT_R8 8 92#define PT_R9 9 93#define PT_R10 10 94#define PT_R11 11 95#define PT_R12 12 96#define PT_R13 13 97#define PT_R14 14 98#define PT_R15 15 99#define PT_R16 16 100#define PT_R17 17 101#define PT_R18 18 102#define PT_R19 19 103#define PT_R20 20 104#define PT_R21 21 105#define PT_R22 22 106#define PT_R23 23 107#define PT_R24 24 108#define PT_R25 25 109#define PT_R26 26 110#define PT_R27 27 111#define PT_R28 28 112#define PT_R29 29 113#define PT_R30 30 114#define PT_R31 31 115 116#define PT_NIP 32 117#define PT_MSR 33 118#ifdef __KERNEL__ 119#define PT_ORIG_R3 34 120#endif 121#define PT_CTR 35 122#define PT_LNK 36 123#define PT_XER 37 124#define PT_CCR 38 125#define PT_SOFTE 39 126#define PT_RESULT 43 127 128#define PT_FPR0 48 129 130/* Kernel and userspace will both use this PT_FPSCR value. 32-bit apps will have 131 * visibility to the asm-ppc/ptrace.h header instead of this one. 132 */ 133#define PT_FPSCR (PT_FPR0 + 32) /* each FP reg occupies 1 slot in 64-bit space */ 134 135#ifdef __KERNEL__ 136#define PT_FPSCR32 (PT_FPR0 + 2*32 + 1) /* each FP reg occupies 2 32-bit userspace slots */ 137#endif 138 139/* Additional PTRACE requests implemented on PowerPC. */ 140#define PPC_PTRACE_GETREGS 0x99 /* Get GPRs 0 - 31 */ 141#define PPC_PTRACE_SETREGS 0x98 /* Set GPRs 0 - 31 */ 142#define PPC_PTRACE_GETFPREGS 0x97 /* Get FPRs 0 - 31 */ 143#define PPC_PTRACE_SETFPREGS 0x96 /* Set FPRs 0 - 31 */ 144#define PPC_PTRACE_PEEKTEXT_3264 0x95 /* Read word at location ADDR on a 64-bit process from a 32-bit process. */ 145#define PPC_PTRACE_PEEKDATA_3264 0x94 /* Read word at location ADDR on a 64-bit process from a 32-bit process. */ 146#define PPC_PTRACE_POKETEXT_3264 0x93 /* Write word at location ADDR on a 64-bit process from a 32-bit process. */ 147#define PPC_PTRACE_POKEDATA_3264 0x92 /* Write word at location ADDR on a 64-bit process from a 32-bit process. */ 148#define PPC_PTRACE_PEEKUSR_3264 0x91 /* Read a register (specified by ADDR) out of the "user area" on a 64-bit process from a 32-bit process. */ 149#define PPC_PTRACE_POKEUSR_3264 0x90 /* Write DATA into location ADDR within the "user area" on a 64-bit process from a 32-bit process. */ 150 151/* Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go */ 152#define PTRACE_GETVRREGS 18 153#define PTRACE_SETVRREGS 19 154 155#endif /* _PPC64_PTRACE_H */ 156